A business practice which should be discouraged

I’m not quite sure about what are all the circumstances surrounding recent updates of this app. What I do know is that I used to be able to read the whole file, as well as export it to PDF, using the free version of this app. But not anymore.

I’m all for writing apps with the intention of making money out of them. But downgrading an app on an update is a very dishonest way of promoting your software to your current users. Or am I the only one who find this bizarre?

Michael Marcondes de Freitas about DjVu Reader